Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 58664200CA7 for ; Wed, 31 May 2017 03:03:09 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 56F43160BDC; Wed, 31 May 2017 01:03:09 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id 9FCA1160BC9 for ; Wed, 31 May 2017 03:03:08 +0200 (CEST) Received: (qmail 98779 invoked by uid 500); 31 May 2017 01:03:07 -0000 Mailing-List: contact commits-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list commits@cassandra.apache.org Received: (qmail 98766 invoked by uid 99); 31 May 2017 01:03:07 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 31 May 2017 01:03:07 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 3553ECCE76 for ; Wed, 31 May 2017 01:03:07 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -100.002 X-Spam-Level: X-Spam-Status: No, score=-100.002 tagged_above=-999 required=6.31 tests=[RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id KCa7aSa0f3He for ; Wed, 31 May 2017 01:03:06 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTP id 937C45FDFD for ; Wed, 31 May 2017 01:03:05 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id B7FECE0D3C for ; Wed, 31 May 2017 01:03:04 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 2C96121B5B for ; Wed, 31 May 2017 01:03:04 +0000 (UTC) Date: Wed, 31 May 2017 01:03:04 +0000 (UTC) From: "Jay Zhuang (JIRA)" To: commits@cassandra.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (CASSANDRA-13548) system.paxos improvements MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Wed, 31 May 2017 01:03:09 -0000 [ https://issues.apache.org/jira/browse/CASSANDRA-13548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16030457#comment-16030457 ] Jay Zhuang commented on CASSANDRA-13548: ---------------------------------------- How about making Paxos TTL configurable: https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/SystemKeyspace.java#L1067 ? Why it has to store at least 3 hours Paxos data? > system.paxos improvements > ------------------------- > > Key: CASSANDRA-13548 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13548 > Project: Cassandra > Issue Type: Improvement > Components: Core > Reporter: Jeff Jirsa > Priority: Minor > Fix For: 4.x > > > There are a few practical changes we can make to {{system.paxos}} that will improve (especially read) performance for LWT: > - We should decrease the compression chunk size for situations where we have to go to disk > - We can change the primary key structure so that the row key and CFID are both part of the partition key, which will decrease LCS compaction activity in use cases where a row key is common across tables, and one table is updated more frequently than the other. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org For additional commands, e-mail: commits-help@cassandra.apache.org